Pump



R. K. YOUTIE Jan. 31, 1961 PUMP Filed Jan. 31, 1958 IN VENTOR.

United States Patent 6 l 7 3201 PSFS Bldg., 12 s. 12th St., Philadelphia 7, Pa.)

Filed Jan. 31, 1958, Ser. No. 712,495

3 Claims. (Cl. 114-183) This invention relates generally to pumps, and is especially concerned with pumps of the oscillating cylinder type. One object of the present invention is to provide a pump including a casing or housing containing a reciprocable piston and adapted to be mounted for oscillating motion wherein one casing'end is alternately raised and lowered to cause reciprocation of the piston by its own weight, so that fluid is drawn into and expelled from the piston upon its back and forth movement in the casing.

It is another object of the present invention to provide the novel combination of a pump of the type described arranged and mounted in a navigable vessel or boat so that the natural rocking of the vessel in the water causes the up and down oscillation of the casing. Other objects of the present invention will become apparent upon reading the following specification and referring to the accompanying drawings, which form a material part of this disclosure.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts, which will be exemplified in the construction hereinafter described, and of which the scope will be indicated by the appended claims.

In the drawings:

Figure 1 is a sectional view taken through a vessel or boat having installed therein a pump of the present invention;

Figure 2 is a longitudinal sectional view showing the pump of Figure 1 apart from the boat;

Figure 3 is a longitudinal sectional view similar to Figure 2, but showing a slightly modified pump construction of the present invention;

Figure 4 is a longitudinal sectional view similar to Figures 2 and 3, but showing still another modification of the present invention; and

Figure 5 is a longitudinal sectional view similar to Figures 2-4, but showing yet another embodiment of the present invention.

Referring now more particularly to the drawings, specifically to Figure 1 thereof, there is illustrated therein a boat hull, generally designated 10, including a bottom wall 11, and a pair of laterally spaced, upstanding sides 12. While the boat hull is illustrated as having a flat bottom, it is, of course, appreciated that a round bottom hull may also be used, if desired.

Interiorly of the boat hull 10, and preferably arranged to extend laterally thereof along the bottom 11, is a pump, generally designated 15. The pump may be provided, as illustrated, with a pair of outlet conduits 13 each communicating between the pump proper and the exterior of the vessel or hull 10, as by opening over or through the boat sides 12.

The pump 15 is shown in greater detail in Figure 2, as including an elongate hollow casing or housing 16, which may be a cylinder and is preferably arranged laterally of the boat so as to have rotary oscillating motion 2,969,761 Patented Jan. 31, 1961 about an axis transverse of the cylinder upon natural lateral rolling or rocking of the boat in the water. More specifically, the casing 16 is preferably located with its medial region along the longitudinal center line of the boat so as to have its rotary oscillation about a transverse axis extending through the medial region of the casing. In this way, the opposite casing ends will alternately move up and down, or raise and lower upon rolling of the boat. However, it is essential that at least one end of the casing move up and down upon rocking of the boat, for reasons appearing presently, so that the casing may have its medial region off-set from the longitudinal centerline of the boat, if desired. As illustrated, the casing 16 includes an inlet port 17 opening into the casing at a medial region thereof and provided with a one way valve 18 arranged to pass liquid into the casing and prevent the passage therethrough of liquid from within the casing. The one way valve 18 may be of any suitable construction, a ball valve being illustrated for clarity of understanding. The inlet port 17 communicates between the lower interior region or bilge of the vessel 10, and the interior region of the casing 16.

At opposite ends of the casing 16 are provided a pair of outlet ports 20, each including a one way valve 21 adapted and arranged to pass liquid from the interior of the casing to the exterior thereof. That is, each of the outlet ports 20 communicates from the interior of the casing 16, at one end thereof, and is connected to a respective outlet conduit 13 for communication therethrough with the exterior of the vessel 10.

Interiorly of the casing 16, and slidable therein for reciprocatory or back and forth movement longitudinally thereof, is a piston 23. That is, the piston 23 is movable between opposite ends of the cylinder or casing 16; and, moves therein by its own Weight upon oscillation of the cylinder due to rocking action of the boat. The outlet ports 20 are thus located adjacent to opposite extremities of back and forth movement of the piston 23, while the inlet port 17 is located medially of the path of piston reciprocation.

In operation, bilge waterwill pass into the casing 16, between the piston 23 and the remote casing end, as seen in Figure 2, through the inlet port 17; and, upon rocking movement of the boat to raise the right-hand end of the casing, the piston will gravitationally slide toward the left-hand piston end of the casing. This gravitational piston movement forces the liquid contained in the casing to pass outward therefrom through the left-hand outlet port 20, as no liquid can pass outward through the port 17. The liquid thus expelled cannot return to the casing by reason of the one way valve 21. As the piston 23 slides gravitationally downward and to the left, passing the inlet port 17, the valve 18 of the inlet port opens, both by the low pressure created in the casing 16 to the right of the piston and by the force of the external water, to pass water into the casing between the piston and the right-hand casing end. The above described operation is, of course, repeated upon piston movement in the opposite direction resulting from upward oscillating movement of the left-hand end of casing 16. Hence, the pump 15 as illustrated is double acting, but may of course be single acting, if desired, by the mere permanent closure of one casing end.

The embodiment of Figure 3 shows a pump 15a substantially identical to the pump 15 of Figure 2, but provided with a pair of inlet ports 17a, each located adjacent to a respective end of the casing 16a, in place of the medially located inlet port 17. Each of the inlet ports 17a may be provided with a one way valve 18:: permitting the ingress of liquid from the bilge of boat 10 to the interior of the casing 16a, but preventing the egress of liquid therefrom. The inlet port 20a having one way valve 21a at opposite ends of the cylinder 16a are substantially identical to the inlet port of the pump 15.

In operation, the pump 15a is similar to that of Figure 2, except that each inlet valve18q opens. earlier in the stroke of piston 23a away fromtthe respective port to provide a longer intake period! and insure filling of the casing upon each stroke. The pump 15a is also double acting, but may be single acting, if desired, by closing a pair of inlet and outlet ports 17a and 20a adjacent to one end of the casing.

In Figure 4 is illustrated a valve generally designated 15b, which is substantially the same as the valve,15 in Figure l, but wherein the piston 23b is of greater length and serves as a closure for the inlet port 1712, thereby eliminating the need for a one way valve in, the. inlet port. Thus, upon movement of the piston 23b to one extremity of its reciprocatory path of motionin the casing 16b, asil-lustrated in Figure 3, the inlet port 17b is opento receive liquid from the bilge of the vessel. Upon rocking of the vessel to oscillate the right-hand end of casing 16b upward, the piston 23b gravitationally shifts downward and to the left, quickly closing the inlet port 17b, and during the remainder of its stroke expelling the liquid from the casing through the outlet port 20b and its-valve 2112. Of course, operation of the pump 15b is the same upon upward oscillating movement of the left-hand end of the casing 16b; and, the pump 15b may also be converted tosingle action, if desired.

In the embodiment of Figure 5, wherein a pump is generally designated 150, the elongate casing 160 is of slightly arcuate configuration, as for better conforming arrangement in a round bottom or V-hull boat. The arrangement of inlet port 110 and outlet ports 20c, and their respective valve 18c and 210 is substantially identical to that of the pump 15 of Figure 2. In place of the conventional sliding pistons 23, 23a and 23b of Figures 2, 3

and 4, the piston 230 of Figure Sis defined by a rolling ing the configuration of a sector of a toroid may be substituted in the embodiment of Figure 5 if it is preferred to obtain sliding rather than rolling action.

Although the present invention has been described in some detail by Way of illustration and example for purposes of clarity of understanding, it is understood that certain changes and modifications may be made within the spirit of the invention and scope of the appended claims.

What is claimed is:

1. A bilgepump for a vessel adapted to navigate in water anditbe rocked thereby, said pump comprising an elongate casing mounted in said vessel for rocking movement with the vessel about an axis transverse of said casing to alternately raise and lower opposite ends of said casing, a single inlet port medially of said casing for communication between the interior thereof and the lower interior region of said vessel for passing liquids only from. the latter into said casing, outlet ports at opposite ends of saidrcasing for passing liquid only from the in: terior to the exterior of said casing, a pair of conduits connected to saidcasing each with one end communicating through a respective one of said outlet ports with the interior of said casing and the other end communicating with the exterior of said vessel, and a rigid piston mova- 12 9 by i gh back an forth s casing upon sa d ocki 9veme. @.t movement of Said p t n in p ss te direction enabling liquid to pass through said inlet port into said casing alternately on opposite sides of said piston a fiec ins de i ery of liquid rom s d ca t nately through said outlet ports and conduits for removing liquid from said vessel,

2. A pump according to claim 1 ,whereinsaid piston is slidable in said casing.

3.A pump according to claim 1, wherein said piston is rollable in said casing.

References Cited in the file of this patent UNI ED STA ES E TS GreatBritain of 1885 

